Terminal Beam Failure Detection Configuration for Multi-TRP Reliability
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Solution Overview
Problem
In next-generation mobile communication systems, particularly in NR, controlling beam failure detection and recovery across multiple transmission/reception points (TRPs) is challenging, leading to potential communication throughput reduction and quality degradation.
Innovation Solution
A terminal equipped with a control section that determines the appropriate configuration for beam failure detection and recovery based on information related to beam settings, uplink control channel resources, and spatial relations, enabling effective scheduling request transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection is performed in multiple TRPs/UE panels, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides beam failure detection into per-TRP/panel segments, where each TRP or UE panel independently monitors beam failure conditions. This segmentation allows the system to track failures in specific spatial units without requiring complete system-wide failure detection, reducing overall complexity while maintaining reliability through localized monitoring.
Solution Approach 2:
The patent applies different beam failure detection configurations to different TRPs and UE panels based on their specific characteristics and failure risks. By tailoring detection parameters, thresholds, and monitoring intensity to local conditions, the system achieves high reliability for critical links while avoiding unnecessary complexity in less critical areas.
2Measurement precision
If per-TRP beam failure detection is configured, then beam failure recovery accuracy is improved, but scheduling request transmission complexity increases
Solution Approach 1:
The patent pre-configures multiple uplink control channel resources and spatial relations before beam failure occurs. When failure is detected, the terminal can immediately select from pre-prepared resources rather than performing real-time resource selection, which reduces transmission complexity during the critical recovery phase while maintaining high recovery accuracy.
Solution Approach 2:
The patent enables dynamic selection of uplink control channel resources and spatial relations based on the detected failure conditions and terminal capabilities. The system can adaptively choose the most appropriate resource from configured options, balancing recovery accuracy with transmission complexity based on real-time situational assessment.
3Adaptability or versatility
If multiple uplink control channel resources are configured for cell group, then beam failure recovery capability is improved, but control section processing complexity increases
Solution Approach 1:
The patent configures multiple uplink control channel resources and spatial relations in advance, including more options than strictly necessary. This excessive configuration provides flexibility for future scenarios and allows the control section to use simple selection rules (e.g., first available, most reliable) rather than complex optimization algorithms, thereby managing processing complexity while maintaining high adaptability.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a control section that determines, on the basis of at least one of information related to configuration of per-transmission/reception point beam failure detection for a specific cell included in a cell group, information related to configuration of an uplink control channel resource corresponding to a scheduling request configured for the cell group, and information related to a spatial relation corresponding to the uplink control channel, at least one of a spatial relation and an uplink control channel resource used for transmission of the scheduling request, and a transmitting section that transmits the scheduling request.